The two-port Fast Ethernet/ISL fiber and copper port adapters provide 100-Mbps, 100BaseT Fast Ethernet and Inter-Switch Link (ISL) VLAN transport over switch-to-switch backbone connections or switch-to-server data center attachments. The two-port Fast Ethernet port adapters are available for Cisco 7500 series and Cisco 7200 series routers.With this latest key piece of inter-VLAN bridging and routing functionality, network administrators can deploy 100-Mbps Token Ring VLAN transport, 100-Mbps Ethernet VLAN transport, and bridging or routing between the mixed LAN types using the same physical ISL trunk links. This flexibility enables network administrators not only to build high-speed, frame-based network topologies, but to architect a smooth migration path from Token Ring to cost-effective 100-Mbps or Gigabit Ethernet backbone environments.